Toma, a rambunctious and mischievous boy, causes trouble every day. For Bangsil, whom he likes, he decides to become a Taoist master. He runs away from home to Nudeok Mountain, where he is taken in by Meoteori, who wishes to train a disciple. Meoteori hides his identity as a Taoist master and helps him. One day, Meoteori uses his powers to save Toma from a demon, but Toma mistakenly believes he has acquired magical powers himself...